Accession Number : ADA517273

Title :   Investigation of Thermal Management and Metamaterials

Descriptive Note : Master's Ttesis

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT

Personal Author(s) : Roman, Calvin T.

PDF Url : ADA517273

Report Date : MAR 2010

Pagination or Media Count : 198

Abstract : Thermal metamaterials are materials composed of engineered, microscopic structures that exhibit unique thermal performance characteristics based primarily on their physical structures and patterning, rather than just their chemical composition or bulk material properties. The heat transfer performance attributes of the thermal metamaterial are such that similar performance cannot be obtained using conventional materials or compounds. Thermal metamaterials are an emerging technology, and are just now beginning to be acknowledged and developed by the microelectronics and material sciences community. This thesis effort analyzed the current state of thermal metamaterial research, examined the physics and theory of heat transfer and electrical conductivity in thin film microelectronic designs, and then developed, modeled, fabricated, and characterized a series of ten proof-of-concept thermal metamaterial devices. Modeling and testing of these microelectromechanical systems (MEMS) based thermal metamaterial prototypes showed that the electrical and thermal conductivity of the devices can be switched within a certain operational range, and that this switching is a function of actuation of the metamaterial?s structural elements, not just its chemical composition. In addition, this thesis presented the physics and fundamental principles of carbon nanotubes (CNTs). This background work supported later detailed description of a series of prototype CNT braided ropes. The diameter, electrical resistivity and conductivity, and heat transfer characteristics of these CNT braided rope prototypes was determined. These unique prototypes exhibited performance attributes that should prove useful to future thermal metamaterial designs.

Descriptors :   *HEAT TRANSFER, *THERMAL PROPERTIES, *ELECTRICAL CONDUCTIVITY, *THERMAL CONDUCTIVITY, THEORY, STRUCTURES, THIN FILMS, STRUCTURAL COMPONENTS, PROTOTYPES, CARBON, MICROSCOPY, CHEMICAL COMPOSITION, MICROELECTRONICS, TEMPERATURE CONTROL, ELECTRICAL RESISTANCE, MATERIALS, PHYSICAL PROPERTIES, PERFORMANCE(ENGINEERING), MANAGEMENT, THESES

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE